Methodological issues in the design and conduct of public health computer assisted telephone interview surveys: the case of informal carers in Australia

The academic literature contains surprisingly little information regarding the design and conduct of surveys dealing with sensitive social issues. The present paper is an attempt to help fill that gap so that other researchers conducting similar projects can learn from our experience. In particular, I focus on the various challenges we encountered in carrying out a computer assisted telephone interview (CATI) survey of informal carers in Australia, our responses to these challenges and our learnings from this endeavour. In the present article, I discuss the following issues: cost-efficient sampling for small numbers; opt-out versus opt-in approaches to respondent participation; status errors in administrative data; reducing respondent refusals; interviewing non-English speakers; questionnaire topic order; carers who care for more than one person; and interviewer training, including interviewer and/or respondent distress. The conclusions were: (1) carers are generally willing and able to answer quite sensitive questions around caring, despite the fact that they may become distressed in doing so; (2) carers are willing to answer a rather long (25 min) telephone survey; (3) thorough interviewer training is critically important, with an emphasis on achieving a balance between sensitivity and efficiency; and (4) respondents should be given the opportunity at the end of the interview to make additional comments and to provide their contact details should they desire follow up from an appropriate authority.